Tube jack



Jan. 1, 1929.

P. WEBER TUBE'JACK Filed Jan. 20, 1927 Patented Jan. 1, 1929.

UNETED STATES PETER XVEBER, OF PHILADELPHIA, PENNSYLVAJIA.

TUBE JACK.

Application fi1ed January 20, 1927.

The object of my invention is to constructa jack for spreading tubes of pressure stills, tubular boilers, and the like. VVhen it is desired to replace a. tube, the jack of my inven tion can be readily inserted between two tubes and the tubes ean be spread apart the distance required by simply turning a handserew.

In the accompanying drawing, Fig. 1 is a side view illustrating my improved jack for spreading tubes;

Fig. 2 is a seetional view on the line 22, Fig. 1;

Fig. 3 is a view showing detached; and

Fig. 4 is a diagrammatic plan 'VieW sbowing the jack in position between two tubes.

The two members 1 and 2 of t-he j aek are pivotally conneeted by a pivot-pin 3 in the form of a bolt which passes through the two cheekpieces 44 of tbe member 1 and through that portion of the member 2 whieh is located between the eheek-pieces.

The opposite end ofthe member 1 is bent as shown in Fig. 3 and connected to tbis end of the meanber is a yoke 5, a pivot-pin 6 coupling the two parts together. V

The end of the member 2 is lorked as at 13 and located in t-he forked end is a nut 7. The

parts of the jack nut bas reeesses to receive the pivot bolts 88,

Whieh extend through threaded openings in the forked end of the meinber 2. An operating sorew 9 extends through tbe nul: 7 and is beld in the yoke 5. The screw is rednced in diameter at the end and extends through a hole in the yoke. A nut 10 and a washer are mounted on the projecting end of the scrw and hold the nut to the yok, but allow the screw to turn in the yoke.

Atthe opposite end of the screw is a cross bar can slide in the screw to allow it to pass obstruotions when be1ng turned to open or close the ack.

bar 11 by whioh the screw oan be turned. The

WVheu it is desired to replace a tube, the j aek is inserted between two tubes as shown in Fig. 4: about midway of the length 0.1 the tubes and when the curved portions are opposite the tubes, tho screw is turned, causing the members to open. and engage the tubes 6-7), and on continuing the movement the tubes a1o spread apart sutficiently toallow a tube to be removed and another placed in position. The tubes engaged by the curved surface of the jack hold the jack against longitudinal movement. After a tube has been replaced, the jack ean be eollapsed and readily removed.

I daim 1. The combination in a tube-jack, of two 1ne1nbers pivotally connected; an operating serew attached to the outer end of onemember; and a nut on tbe outer end of the other member whieh is engaged by tbe screw, the

1ne1nbors ha.ving ourved surfaces betueen the serew and tbe pivot to engage the tubes to be spread apart.

2. Tbe oombination in a tube-jack, of two members pivotally eonnected at one end; a yoke pivoted to the opposite end of one momber, the end of tbe other member being t'orked; a nut swivelled in the forked end of said membei; and an opelating serew attached to the yoke and free to turn therein and extending through the nut, so that on turning the screw, the members of the jack can be moved to or from ea.ch other.

PETER VEBER. 

